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' J. W. MGDONGUGH & H. H. "ELDRED I TELEPHONE SWITCH.

No. 857,882. Patented Feb. 15, 1887.

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No. 357,682. y .Patenteden 15,1887.l

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JAMES W. MCDONOUGH AND EIQRACE H. ELDRED, OF NEV YORK. N. Y.

TELEPHONE-SWITCH..

SPECIFICATION forming part of Letters Patent No. 357,682, dated February15.41887. I

Application led Angustl, 1884.

To aflirwtcm it may concern: Be it known that waliirns W. MODON- ouenand Hon-Aon H. ELDR-ED, citizens of operation o f the switchingapparatus operated by the user of the telephone maybe insured, andderangement of the apparatus 'or failure 'to-operate the switch, throughinattention, ignorance, or neglect, may be avoided,

Our invention consists,primarily,in the combination, with the apparatus,.of an electric alarm in a circuit so arranged that if the user of thetelephone shall hang it up without turning back the switch to normalposition the circuit of the alarm will be automatically comv and theperson at .25

pleted by the hanging up of the instrument, hand will be thus advised ofthe neglect.

Our invention consists, further, int-he `comu bination, with atelephone-support,of a guard Vcircuits, and an alarm whose circuit ispar- Y phone ishung up, so that the alarm will sound v or `checksuitably arranged to prevent the telephone from being removed for useuntil the switchv is operated to complete the proper tially completed bythe s witch when thus operated, and is wholly completed when thetelcwhile the telephone is hung up, and the switch at the same timeremainsout of normal positin,or position to lock thetelephonabut willcease to sound if the switch be restored to normal position.

Our invention consists, further, in certain minor details andcombinations which will be more spsciticallystated in the claims.

In carrying ont our invention we may use any form of alarm, but preferto employ an antomatic vibrator-bell. The circuit for said nell may beany circuit containing a battery,

or other sourceof electricity, but Wegener'- ally prefer to makethe'circuit a localone. To avoid the employment of an extra battery, wehave arranged the circuits so that the batfor the telephonetransmittermay be" ter utiiized for the purposes of the invention.

Serial No. 140,673. (No model.)

ive circuits when the switch is thrown in one or the other direction,and-automaticallyby the act of hanging up the telephone for the purposesherein described.

The invention is illustrated, partly in diagram, in Figs. 1 and 2 o fthedrawings.

A indicates inoutlihe the case or boxcontainingorsupporting the variousdeviceshere` iuafter described. 1

B indicates a magneto generator and bellof the ordinary or suitableconstruction adapted to give an alarm vor signal by currents sent from adistant station, or to send currents for callingup a distant station.

D indicates a switch-lever pivoted on the casing A and connected withline L. Its end may be thrown into contact with either oftwo studs, c b,the latter of which is connected with the magneto-bell B, and so to thecontinuation of the line L, or to earth, while the former, a, isconnected with the same -wire L, .through the receiving-telephone C,wire 8, and secondary of the induction-coil I. Vhenthe switchlever D isin its normal positiomor upon stud b, the telephone-receiver is cut outor rendered inoperat-ive, while the apparatus B is' in circuit andincondition to send or receivlea bell-signal inthe ordinary way. Byturning the lever to stud a the signal apparatus is thrown ont and thetelephone is thrown into circuit for use in oral communication. Thethrowing of the switch from its normal position to the position justdescribed completes the circuit -for the primary ofthe induction-coil,the transmitter T, and the local battery L B, by means of acontact-spring, F, carried by the lever D, and, a

stud, c, in the path ofthe spring, in the obvious and well-known manner.The transmitter is of any desired construction, that indicated being ofsubstantially the .bonstruction'shown in patent to J. W. Mc-

- of apparatus and arrangements of circuits einployed in the art.

In carrying out our invention we makesuitable provision whe'reby'in thenormal position of the Switch-(of whatever form it may be) thetelephonerccciver C shall be locked or held, so that it cannot beremoved from its support, and can only be removed or handled for use byoperating the switch so as to make the proper change in the circuit tothrow said telcphoneinto operativeelectric circuits. One way ofeffecting such object is by making the switch-lever or'some attachmentthereto act as an obstruction to prevent the removal of the telephonefrom its hook. This maybe done in the manner indicated by placingatelephone hook or support, E, immediately beneath the stud b, upon whichthe lever rests when the telephone is out of circuit and the bell in.The handle of the lever or other projecting part is, then over the hookand the ring H upon the telephone cannot be slipped from the hook. Bymoving the lever to the stud a,

however, obstruction no longer existsto the taking down of the telephonefor use.

lt will be seen from the above that the user naturally throws thetelephone into circuit |and the bell out of circuit in the actionnecessaryto take down the telephone. In order that he may be made torestore the switch to its normal position afterhanging up the telephone,we provide the electric alarm, which is made to sound so long as theswitch remains thrown against the stud a after the telephone is hung'up.

R indicates the alarm, which may be of any desired or suitableconstruction. XVe prefer to make it an automatic vibrator, which willring so long as its circuit through abatteryremains complete. Itscircuit through battery VL B is completed for this purpose automaticallyby the act of hanging up t-he telephone. One way that may be employedfor causing this to be done consists in making the hookE and the ring Hclose the circuit by coming into contact with one another. The ring Hisconnected by a flexible conductor, W, or otherwise, vwith one pole ofthev battery L B,

through any suitable circuit-controller, such as will be presentlydescribed, that is operated with the switch when thrown away from normalposition. and against stud a, while the hook E is electrically connectedthrough the 'bell R with the other pole of the battery.

The circuit controller, operated by the switch, consists, simply, of thespring G, carried upon the lever, but out of electrical connectiontherewith, and stud on, against which tne spring Gbearswhile thclever isagainst stud al rlhe springs F and G are in electrical connection, beingformed from a common piece of metal. As will be obvious, when the leverhas been turned to throw the telephone into cir cuit, the effect ofhanging up the telephone Without throwing the switch back to normalposition is to cause a continuous ringing of the bell R, whosecireuitfromL B is then cornplete through E, H, W, m, G, F, and c. Notuntil the switch is thrown back to normal position, so that the localcircuit will be broken at m G, will the bell cease to ring.

Any suitable circuit-closing devices may be used in place of the springG and stud mf, the purpose being, so far as this element of thecombination is concerned, to complete one break in the circuit of analarm automatically by the act of throwing the switch to put vthecircuits for the oral communicating apparatus into operative condition.So, also, other means `might be Aemployed for completing a circuit bythe act of hanging up the telephone, or resterA ing said telephone toits normal position, the purpose being merely to automatically close abreak in the circuit of the alarm by the mere act of hanging up thetelephone, or restoring it to normal position.

. Instead of using a separate flexible cord, W, we may accomplish thesame results by simply placing the hook or ring H in direct electricalconnection with one ofthe binding-posts on the telephone-receiver (J,preferably that one v'connected to the stud a, and electricallyconnecting the stud m with the stud a, as shown in Fig. 2. lSuchconnection may be formed by a screw passing through the shank of thering. H, as indicated in Fig. 2, into the shank of the bindingpost. Inthis diagram we have shown another form of the transmittefbeforereferred to. It consists, as indicated, simply of the conducting-blocksa a, in which rest loosely the bars or rods b, all preferably of carbon,and supported in accordance with the patent before mentioned upon asuitable' diaphragm, T. The circuit by which the bell R is rung when thetelephone is hung up is in this case completed as follows: From one poleof battery L B to bell R, hook E, ring H, binding-post of telephoneG,wire connected thereto, stud a, stud m, springs G F, stud c, and tothe other pole of the battery. The leffect is obviously, as alreadydescribed, to cause the bell to ring while the telephone is hung up andthe switch is at the same time away from its normal'position.

What we claim as our invention is-.

v1. The combination, with a telephone appaA ratus, ofv a switch` forthrowing the telephone into and out of action, and an alarm having twobreaks in its circuits, one of which is closed by the switch when inposition to place ICO IIO

previous restoration of the telephone-switch to itsnormal position, asand for the purpose described. The combination, in a telephoneapparatus, of a local alarm-bell, a transmitter-battery., and extraconnections from the latter to the alarm, a telephone-support, andacircuitcoutroller operated by the telephone-switch tus into and outofoperative condition.

4. The combination, with a telephone apparatus, of an electric vibratoralarm, a local circuit therefor, a switch for throwing thetelecondition, and circuit-controlling devices for said circuit, oneoperating with the switch and closed when the telephone apparatus isthrown into-operation, and the other operated by the telephoneandcompleting the circuit when the latter is hung up after use.

' 5. The combination, with a telephone snpport and switch, of aguardthat normally, or

while the telephone is outoi` action, prevents the telephone from beingremoved from its support, an alarm-bell, and 'a circuit thereforcontrolled jointly bythe telephone-switch and in the act of, throwingthe telephone apparaphone apparatus into and out of operativev phone'can be removed from its 'support for use only 'by operating theswitch,.while the bell will ring if the telephone be hung up withoutrestoring the switch to its normal position.

6. The .combination,with a telephone-switch, of atelephone support, aguard arranged in the manner described to prevent the removal switch isin its' normal position, an alarm-bell and a circuit therefor having twobreaks in -series, one of which is closed in the act of ythrowing the'switch from normal position, while the other is completed vin hanging upthe telephone.

7. The combination, with a telephone apparatus, of a telephone-supportguarded to prevent the removal of the telephone from its tion to throwthe telephone out of action, an alarm-bell, and a circuitv thereforhaving con-V nections to the telephone-support and the part of telephoneresting on said support, as and for the purpose described. Y

York and State of New York, this 6th day of July, A. D. 1884-.

' JAMES W. MCDONOUGH.

HORACE H. ELDRED. Witnesses: A T-Hos. TooMEig, GEO. QCOFFIN.

the telephone-as described, so that lthe tele-l Signed ait-New York, inthe county ofv New 4". of the telephone from its support when thesupport when the telephone-switch is in posi-

